Cited by 369Electrocatalysts for Energy ConversionFuel Cells and Related MaterialsCO2 Reduction Techniques and Catalysts

Lanthanide-regulating Ru-O covalency optimizes acidic oxygen evolution electrocatalysis

Open access
Li, Lu, Zhang, Gengwei, Zhou, Chenhui, Lv, Fan, Tan, Yingjun, Han, Ying, Luo, Heng, Wang, Dawei +8 more·2024·Nature Communications

Abstract

Precisely modulating the Ru-O covalency in RuO x for enhanced stability in proton exchange membrane water electrolysis is highly desired. However, transition metals with d -valence electrons, which were doped into or alloyed with RuO x , are inherently susceptible to the influence of coordination environment, making it challenging to modulate the Ru-O covalency in a precise and continuous manner. Here, we first deduce that the introduction of lanthanide with gradually changing electronic configurations can continuously modulate the Ru-O covalency owing to the shielding effect of 5 s /5 p orbitals. Theoretical calculations confirm that the durability of Ln-RuO x following a volcanic trend as a function of Ru-O covalency. Among various Ln-RuO x , Er-RuO x is identified as the optimal catalyst and possesses a stability 35.5 times higher than that of RuO 2 . Particularly, the Er-RuO x -based device requires only 1.837 V to reach 3 A cm −2 and shows a long-term stability at 500 mA cm −2 for 100 h with a degradation rate of mere 37 μV h −1 .

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Crossref · 10.1038/s41467-024-49281-2

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  • Metal Ru has a high charge density, leading to excessive adsorption of reaction intermediates during the HER and ORR.

    “metal Ru has a high charge density, leading to excessive adsorption of reaction intermediates during the HER and ORR.”

    From Interface strain engineering of a Ru–RuO <sub> <i>x</i> </sub> /graphene aerogel composite boosts HER, OER and ORR applications (2026) · cites this paper as [17]

    The Results section on adsorption behavior discusses *OH adsorption on Er-RuOx and RuO2 during oxygen evolution, not metallic Ru during HER or ORR. Searches for high charge density in metallic Ru and excessive adsorption during HER or ORR found no passage addressing the claim; page numbers were not available in our copy. (LLM, conf=0.76)

    Experimental — accuracy not yet measured

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Authors
Li, L., Zhang, G., Zhou, C., Lv, F., Tan, Y., Han, Y., Luo, H., Wang, D., Liu, Y., Shang, C., Zeng, L., Huang, Q., Zeng, R., Ye, N., Luo, M., & Guo, S.
Affiliations
  • Peking University (CN)
  • Kunming University of Science and Technology (CN)
Corresponding author
Guo, Shaojun
Venue
Nature Communications
Published
2024-06-11
Volume
15
Issue
1
Pages
4974-4974
ISSN
2041-1723 (ISSN-L)
OpenAlex
W4399539823
Cited by
368
References
37
Citations by year
2026: 121 · 2025: 206 · 2024: 41
FWCI
24.53
Type
journal article
Language
en
Open access
Locations
  • Nature Communications (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Funders
  • Salt Science Research Foundation (BL14W1)
  • National Natural Science Foundation of China (52261135633, 52303363, 22105007, 22309004, 52333010, 22205010, 52025133)
  • China Postdoctoral Science Foundation (2022M710187, 2020M670018, 2023M730051, 2023M730029, 2022M720225)
  • China National Petroleum Corporation (2021DQ02-1002)
  • Peking University (2021DQ02-1002)
  • National Postdoctoral Program for Innovative Talents (BX20220009)
  • Beijing Synchrotron Radiation Facility (BL14W1)
Topics
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Fuel Cells and Related Materials
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › CO2 Reduction Techniques and Catalysts
Keywords
lanthanide doping, acidic oxygen evolution reaction, proton exchange membrane water electrolysis, catalyst stability, coordination environment, volcano plot, electrocatalyst degradation

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